Computing device.



C. R. BANNIHR.

COMPUTlNG DEVICE.

APPLICATION FILED SEPT. 12, 1914.

Patented Jan. 30,1917.

2 SHEETSSHEET I.

Inventor.

CAESAR-R. BANNIHR, OF NEW YORK, N. Y.

COMPUTING DEVICE.

Specification of Letters Patent.

Patented Jan 30, 191 7.

Application filed September 12, 1914. Serial No. 861,401.

To all whom it may concern:

Be it known that I, CAESAR R. BANNIHR, a citizen of the United States, residing at New York, in the county and State of New -York, have invented a new and practical Computing Device, of which the following is a specification.

My invention relates to improvements in computing machines and devices commonly known as adding machines; and the object of my improvements are, first to provide as simple a device as will accomplish the purpose; second to arrange it, that it will serve all the purposes of the more complicated machines; thirdly to construct it so it will be comparatively inexpensive and also avoid the possibility of disarrangement. I attain these objects by the mechanism illustrated in the accompanying drawing. These improvements may be embodied in various forms of computing and counting machines although they are illustrated herein in connection with a machine the arrangements and construction which is as follows. The manner of operating is by 'means of a stylus in the little holes, or by placing the index finger on the little circular projections on the periphery of the fig-- ure dials opposite each number, and moving the dial until that point comes to the stop, and so on with every dial. The first dial at the base is for units, the one above for tens and the next for hundreds and so on. The machine also makes a record of the sums added by means of the projections on each dial operating a lever, which acts on a set of figure type wheels that are moved by means of pitmen connected with the levers and acting on a ratchet on the figure type wheels. The record is printed on a strip of paper by means of the paper feeding and printing device arranged on the top of the machine.

The machine is adapted to perform subtraction, multiplication and division by the dials alone and the sum total may be seen through the apertures in the separatorplates; thus it will be seen that the machine is quite complete.

Figure 1, of the drawing is a face view of the machine without the record printing and paper feeding device shown. Fig. 2, a cross section on the line at of Fig. 1. The sectional shading of the base and separatorplates omitted for clearncss. Fig. 3, a detail side view of one of the separator-plates.

Fig. 4, an edge view of a figure dial. Fig. 5, a face view of a figure dial with dotted lines showing the manner of one dial acting on another. Fig. 6 is a face view of a separator plate and dial arranged for two sets of figures on a dial, and dotted lines showing how one dial acts on another. Fig. 7 is a detail view of the figure type wheels, 1evers, and pitmen. Fig. 8, a side view show- .ing how the printing wheels are mounted.

Fig. 9 is a detail view of the figure type wheels, inking rolls and acting levers. Fig. 10, a detail View showing the spring in the figure type wheel. Fig. 11, a cross section of the same. Fig. 12, a top view of the lever and pitman for actuating the figure type wheels. Fig. 13, is a top view of the presserfoot and paper-feeding device. Fig. 14, a side view, and Fig. 15, a front view of the same.

Similar numerals refer to similar parts throughout the several views.

The stand or frame 1 constitutes the base. To this the separator-plates are secured and between these are placed the figure dials 3, in a recess a, to conform to the shape of the dial. In this recess there is a smaller recess 4 in which is held a washer 5, of felt or other suitable material, to act as a brake on the figure dial 3. The same arrangement to support a washer 5 is provided for on the underside of the separator-plate 2, to act on the figure dial in a similar way. In the center of the recess l is a pivot 6, on which the figure dial turns. On that portion of the separator-plate to the right as shown in the drawing, is a margin 7 and on this figures from 1 to 9 are arranged in proper spacing. Corresponding to these figures, there are placed on the dials 3 two or more sets of figures (as the case may be) from 1 to 0 near the edge of the dials as shown in Fig. 5. Around the dials at the edge are small round projections 8 and on the rim or margin are small holes 9 wherein a stylus may be used to move the dials. These holes and projections correspond to the number of figures on a dial, and are placed a proper distance apart to complete the circle according to the number of figures used. There is a projection, or stop, 1.0 on each separatorplate where the stylus, or finger, stops when the desired number has been moved. The re sult may be seen through the apertures 11 in each separator-plate. The separator-plates containing the dial. overlap each other or are laid one on another at a required distance in the offset to conform to the mechanism by which one dial moves another. This is shown in Figs. 5 and 6.

The annular projections 12 on the under side of the dials have slots 13 cut through at equal distances apart to correspond with the figures, and the projections and holes at the edge of the dials. The slots are laid out on a tangent curve, which corresponds to the sweep of the circle of the pins 1 1, on the reverse or upper side of the dials. The action of one dial disk by the motion of another is attained by means of the offset of the centers 15, on which the dials turn. Thus when the pin 1% on the under dial diskwhile said dial is being moved comes in contact with the side of a slot 13 in the annular projection 12 of the upper dial disk, it will turn that dial disk to the distance of the space between two figures on said dial, and soon, each dial disk will turn the next, and when the pin 1% comes to the opposite side of the annular projection 12 it will pass through freely because the slots 13 when at that point are open in the direction in which the pin 1% travels. The pin lat is so located that it will act onthe next dial disk whenever the tenth point comes to the aperture 11. Any re quired number of separator plates and dials may be laid one on another step by step. The center shaft or post 15 in the dial recess projects above the dial disk, and is in tended to enter the hole on the under side of the separator plate above. The plates are held in position by means of the dowel pins 17, as shown in Fig. 6. In Fig. 2, a hinge 19, takes the place of the dowel pins. The separator plates are secured to the base 1 by means of the screws 20, which pass through the several plates into the base. Thus the device is complete so far as is necessary for the purpose of an adding machine, but to make a record of its action it is necessary to provide the connection between the dials 3, and a set of figure printing wheels. A lever V 21 is secured to each separator plate by the pin 22, which is the fulcrum. At the outer end. of the lever the roll-23, acts against the little projections on the dial, and at the other end is attached the pitinan 2a, which acts on a ratchet on the side of the figure printing wheels By these means each dial has its connection with its respective printing wheel. The levers are of suitable length and have a corresponding change of fulcrum position so the action will be equal on the printing wheel ratchet 26. when tne dials are moved frompoint to point, the printing wheels will more accordingly. The pitmen rest on the pawls 27 that hang on the shaft 28, which is suitably arranged in the base 1, and has the pawl releasing lever 29 on the outer end. The releasing lever when forced down with the Thus.

finger, lifts the pawls 27 and the pitmen 524; by the cam 29 on the pawl, and the figure printing wheels are free to recoil by means of the coiled spring 30 inside of each wheel. These printing wheels and the casing 31, and inking rolls 82, Sec, need no further description here, as there is nothing new about the arrangement over the usual way of mounting these wheels; they turn on a shaft which fits in a casing and this casing is secured to the base 1 of the machine by means of two screws 38.

The presser-foot and paper feeding device 3 1 which fits in grooves T 35, on top of the top separator plate of the machine, has a spring 36 provided to hold the device in position by means of the counter sink 3? in the side of the frame 38, and so it may be adjusted over a second set of printing wheels, and to be easily removed when desired. "The lever 39 is provided with the presser-foot 40 to act between the two cross bars 41 and 41'. This presserfoot lever 39 is also provided with a spring 12, which projects below the presser-foot and will rest on the paper strip 43 on the cushion cross bar 41, holding the paper strip firmly, while the presser-foot draws the paper strip from under the spring at which is the weaker of the two springs and which rests on the paper strip on the cushion cross bar 41 and forces it down until the print is taken, andwhen released. When the spring 42 lets up its pressure on the paper strip, the paper strip will spring up and forward, and is ready for the next operation, while thespring ea, in a fixed position and of an even tension, will hold it in position and keep it from moving backward. Proper spacing is thus effected, and each sum added may be recorded on the paper strip, which may be of any required length, or may be taken from av roll. The sum total in the case of the arrangement as illustrated, can be printed by making the figures on the figure printing wheels compare with the result shown by the dials. This can be done by moving the levers 21 independently of thedials, by means of the knobs 45 on the ends of the levers. The spring 46, on the side of the levers, forces the lever back as it will when the dials operate them.

The dials or disks are made of steel, and the separator plates may be of aluminum or of composition, and the base of cast iron, but this is not material to the improvement herein'shown, as any suitable material may be used in its construction.

lVhat I claim as new and desire to secure.

by Letters Patent of the United States is:

1. Au adding machine comprising a base with a series of dial disks and separator plates thereon, recesses for the dial disks in said separator plates, a center shaft in said recesses, a segmental margin at one lltl side of the separator plates having index figures thereon to correspond with figures on the dial disks, dial disks having figures on their surface near the edge and knob projections corresponding with the figures at the edge, and an annular slotted projection on one side with the slots corresponding to the figures and knobs on said dial disk, and on the other side pins for a given number of slots in the annular projection, the separator plates having recesses on both sides with a. center shaft acting as a pivot for the dial disks on each side, the centers and recesses being in offset relation to each other on opposite sides of the separator plates, the dial disks to turn on said shaft in said recesses on one side of a separator plate to act on. the annular slotted projection by means of the pins at the conjunction of the annular recesses, a lever pivotally arranged on each separator plate adjacent the periphery of the dial disks having a roll at one end engaging with the knob projection on the dial disks, and a pitman on the other engaging with a ratchet operatively connected with a figure type wheel to indicate the sum added at each operation, the separator plates having a stop at each end of the segmental margin, and the knobs on the dial disks being exposed between the stops, an aperture in the separator plates to show the totals all as herein shown and described.

2. In a computing or counting device the combination with a base of a series of figure dial disks, and corresponding separator plates arranged between, a dial disk with an annular slotted projection, pins on the opposite side of said disks, the annular slotted projection extending into a recess on one side of a separator plate and the pins standing above the dial disk and reaching into a recess on the reverse side of the separator plate, and the means for operating the dial disks all as herein shown and described.

3. In a computing or counting machine the combination of a series of figure dial disks provided with a central bearing hole and an annular slotted projection on one side, and pins on the other, and corresponding separator plates arranged to support the dial disks, each separator plate provided with a recess on each side in an offset relation to each other, one recess for the dial disks to fit in provided with an annular recess for the annular slotted projection and a pivot central with the recess on which the dial disks may turn, and on the other side an annular recess wherein the pins on a dial disk may travel to engage with the annular slotted projection on another dial disk at the conjunction of the annular recesses, all as herein shown and described.

4. In a computing device in combination a base, a series of separate plates thereon, dial disks having finger projections on the periphery, said disks supported between the plates, a lever pivoted on each plate adjacent the periphery of the dial disks having a roll at one end engaging between the projections on the dial disks, a spring acting on the lever to position the dial disks by means of the roll between the projections, a series of numeral wheels and a pitman connected to the other end of each lever and operatively connected with each numeral wheel as herein shown and described.

5. An adding or computing device provided with figure dial disks or wheels in re lation to each other that one may move another at required intervals, said dial disks provided with an annular projection having a diameter sufiicient to encompass the centers of two dial disks located on opposite sides of a separator plate, said separator plate and dial disks being arranged in oflt'set relation to each other that the pins on one side of a disk may engage with the slots in the annular projection on another disk at the conjunction of the circles of the pins and the annular projection, the pins being set at a radius of a circle of a required diameter encompassing the center shafts in the separator plates on which the dial disks turn, the slots in the annular projection being so located that a pin on a dial disk may engage with one side of a slot in the annular slotted projection and pass through the slot freely on the opposite side in turning about the centers in the separator plate, all as herein shown and described.

6. In a computing device the arrangement of number dial disks or wheels with a circle of projections on one side and a pin for a given number of projections on the other side, the circle of projections and the circle described by the pins having a diameter large enough to encompass the center pivots on which any two disks or wheels turn, said disks or wheels located on opposite sides of a separator plate, the centers offset at a required distance so the pins on one side of a disk or wheel may come in contact with a projection of the circle of projections on one side of the circle, and pass between said projections on the opposite side of the circle when the disk is moved all as herein shown and described.

CAESAR R. BAN NIHR.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

